Compiler's two ducks causing damage (6)

I believe the answer is:

impair

I'm a little stuck... Click here to teach me more about this clue!

'damage' is the definition.
(I know that impair is a type of damage)

'compiler's two' is the wordplay.
'compiler's' becomes 'I'm' ('I am' referring to the compiler of the crossword).
'two' becomes 'pair' (pair is a kind of two).
'im'+'pair'='IMPAIR'

'ducks causing' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for impair that I've seen before include "blunt" , "Spoil strength, quality of" , "Harm" , "Damage or injure" , "'Mar, damage (6)'" .)

I've seen this clue in The Independent and The Sun.

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